Observation by Mike Harlow: Nova Sagittae 2026: Spectrum

Uploaded by

Mike Harlow

Observer

Mike Harlow

Observed

2026 Sep 15 - 21:00

Uploaded

2026 Sep 16 - 11:08

Objects

Nova Sge 2026
Spectrum

Equipment

12inch F/3.6 astrograph
ASI6200mm CMOS camera, no filter
26cm diameter, 3 degree prism

Exposure

40 x 10 seconds

Location

Ipswich, UK

Target name

Nova Sagittae 2026

Title

Nova Sagittae 2026: Spectrum

About this image

A low resolution spectrum of the nova to monitor for any changes. Hydrogen Balmer series emission lines labelled with HeII emission (at 469nm) below H beta and an OI line at 845nm in the IR. The other OI line at 777nm appears to have faded since my last spectrum on 4th September. Can be compared to the spectrum by David Cejudo on 14th September in the BAA database (over a narrower spectral range). There are also spectra in the ARAS database, e.g. on 14th September showing the same features.

AAVSO data show V-mag ~11.5 and R-mag ~9.5 at the time the spectrum was taken.

Field of view 29 x 36 arc minutes with north up. Note H alpha emission line star at top left.

[Wavelengths were calibrated by comparing with A-type stars in the same field, e.g. bottom right, using the dispersion equation calculated by Nigel Evans].

Files associated with this observation

Nova_Sge_2026_spectrum_20260915_crop.jpg (260.4 kB)

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Jeremy Shears, Andy Wilson, Dominic Ford, Callum Potter

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